1. National Photovoltaic Program Plan, U.S. Department of Energy (DOE/ET-0035(78)), Division of Solar Technology, March, 1978.
2. Solar Photovoltaic Energy Research, Development and Demonstration Act of 1978, U.S. Public Law 95–590.
3. Kazmerski, L.L., Introduction to Photovoltaics: Physics, Materials and Technology (previous chapter).
4. Chemical vapour deposition promoted by r.f. discharge
5. The Preparation and Properties of Amorphous Silicon